68 lines
1.9 KiB
Plaintext
68 lines
1.9 KiB
Plaintext
Title: Power management demo
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Description:
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A sample implementation of a power manager app that uses the zephyr
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power management infrastructure.
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This app will cycle through the various power schemes at every call
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to _sys_soc_suspend() hook function.
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It will cycle through following states
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1. CPU Low Power State
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2. Deep Sleep - demonstrates invoking suspend/resume handlers of devices to
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save device states and switching to deep sleep state.
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4. No-op - no operation and letting kernel do its idle
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This application uses Intel Quark SE Microcontroller C1000 board for
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the demo.
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When started, the app waits for a toggle of GPIO pin 16. GPIO Pin 16 is
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DIO 8 in arduino_101 and DIO 4 in quark_se_c1000_devboard.
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Toggle the GPIO pin in the following sequence:-
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1) Start connected to GND during power on or reset.
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2) Disconnect from GND and connect to 3.3V
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3) Disconnect from 3.3V. Test should start now.
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Building and Running Project:
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make BOARD=<board>
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Troubleshooting:
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Problems caused by out-dated project information can be addressed by
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issuing one of the following commands then rebuilding the project:
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make clean # discard results of previous builds
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# but keep existing configuration info
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or
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make pristine # discard results of previous builds
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# and restore pre-defined configuration info
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Sample Output:
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Power Management Demo
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Toggle gpio pin 16 to start test
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PM demo started
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Low power state entry!
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Low power state exit!
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Total Elapsed From Suspend To Resume = 163869 RTC Cycles
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Deep sleep entry!
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Wake from Deep Sleep!
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Deep sleep exit!
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Total Elapsed From Suspend To Resume = 163986 RTC Cycles
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Deep Sleep wake up event handler
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...
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